ha m b u g e r



@leiten tnts lsttrut @fitte E. HAMB'UGER, OF DETROIT, MICHIGAN.

.Letters Jutunt ivo. 68,436, (lated iS'cpfMnZm-r 3, 1867.

IMPROVEMENT IN LOCKS FOR GAR-SEATS.

dlgs Stimuli nfrrnh tu' in ilgrsc Enters inttnt Amit milking putt nf tigetn'mi.

'IO ALL WHOH IT MAY CONCERN:

Beit known that I, E. IIAMBUGER, of Detroit, in thc county of Wayne, and State of Michigan, have invented a new :1nd useful Improvement in the Locks for Arms of CnrScats; :tnd I do hereby declare that the following is n full, clenr, and exact description of the same, reference being had to the annexed drawings, making a port ot'` this specification, and to the letters of reference marked thereon, in which- I*`igure I is an elevation, and

Figure 2 is :1 sectional view.

'lhe manner of securing the cnr-seat arm is shown at A, side elevation, the lock being held by two screws X X in its position. Tile arm H, to which the buck cushion of the chair is bolted, works freely at the joint I, and in throwing the back of the sont from one side to the other, as may be required, said arm passes close in front of the bolt c a, as shown at a, fig. 2, and upon coming to its proper position the square end o f said bolt is forced, by the action of the spiral spring surrounding it, into a corresponding recess in the arm H, holding the latter in position and locking it fest. The inner angles of H (see section) are out away. at a suitable distance from the centre of the joint I, fig. 1, so that the arm H may, in passing down to ts'plece, press the bcvelled end of the bolt e I; a back without making the use of' thev key d necessary, and lock itself in the required position. To prevent the arm II from being pulled away from the side of the chair, and as a support for the same, the block Y is attached to the chair, forming zt projection in front of H, which rises above the lower part of H, its distanced'rom the face 'of the choir being equal to the thickness of H.

The lock itself consists essentially of a cylinder containing the spring and bolt, having cust on it the anges F F for the purpose of bolting the same to thel chair. (See figures.) One end of the cylinder is open. It contains the spiral spring and bolt, ns shown in fig. 2;L In the other end of the cylinder is a. squareopening, through which the bolt c b a moves, and which it fits. rIhe spring surrounding this bolt is kept in place in the cylinder by the plate e against which it abuts, through which is'cut the key-holo for the admission of' the key d, g. 2, thc other end of the spring pressing onrthc shoulder ofthe bolt c Z1 a, as shown, and causing the square end of the latter to project from the cylinder, unless withdrawn by the key, as hereafter described. Upon the end of the bolt c b a towards the key-hole is cut a screw-thread corresponding with that on the inside of the tube of thc key d. The key d being inserted through the key-hole in the plate e, fig. 2, engages with the screw-thread on the bolt c Z a, and being withdrawn as far as required releases the square end of the boltffrotn the recess in the arm H, allowing the latter to be raised.

What I claim as my invention, and desire to secure by Letters Patent, is

'.lhc lock for cnr-scats, consisting ofthe spring-holta b c catching in the recess ofthe arm H, and operated hy the screw-key, ns herein represented and described- E. y HAMBUGER.

Witnesses:

JAS. W. RoMnYN, T; W. MIZNER. 

